JPH07244168A - Vibration detection device and human body detection apparatus utilizing it - Google Patents

Abstract

PURPOSE:To discriminate a human being from a thing at a a small amplification factor by using a vibration detection means which can detect even a small vibration simply. CONSTITUTION:A part which is faced with a piezoelectric element 1 is provided with a vibration amplification means 2 which has a protrusion part. The vibration, of an object, which is input from a vibration input part is amplified physically by the vibration amplification means 2, and it is applied to the piezoelectric element 1. A vibration is detected on the basis of the amplified vibration. Thereby, even when the vibration of the object is faint, the vibration can be detected simply. In addition, the vibration of a vibration detection means due to the very small body motion of a body at rest is amplified, and a voltage generated from the vibration detection means can be increased. As a result, the existence of a human body can be judged at a small amplification factor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration detecting device for detecting the vibration of an object or the like, and a human body detecting device for detecting the presence or absence of a person on a seat or a bed.

[0002]

2. Description of the Related Art A conventional vibration detecting device uses, for example, an acceleration sensor. When the acceleration sensor is fixed to a vibrating object, the vibration state becomes the same as the vibration of the object. The vibration was detected by generating a corresponding output.

Next, an example of a conventional human body detecting device is shown in FIG.
Shown in. Here, the case where it is installed in the seat is shown.
A piezoelectric element 1 arranged on the seat surface of the seat 7 for detecting body movements of a person, a filter 7 for filtering only a certain frequency component of the output from the piezoelectric element 1, and an output signal from the filter 7 are amplified. Signal amplifying means 8, smoothing means 9 for smoothing the output signal from the signal amplifying means 8, and judging means 10 for judging the presence or absence of a person on the seat based on the output signal of the smoothing means 9.
Was composed of.

When a human body is seated on the seat 11, the piezoelectric element 1 arranged under the surface cloth of the seat 11 is deformed by the body motion of the human body, and a voltage is generated by the piezoelectric effect. A specific frequency component of the generated voltage signal is filtered by the filter 7, amplified by the signal amplification means 8, and smoothed by the smoothing means 9. FIG. 13 shows an output signal waveform of the smoothing means 9 when seated. As shown in FIG. 13, in the case of coarse body movement such as sitting, limb movement, and sitting, the movement is over the whole body, so the piezoelectric element 1 is greatly deformed and a large signal waveform is output from the smoothing means 9. If the person is in a resting state, a relatively low level output such as the S portion in FIG. 13 is produced due to minute body movements of the body propagated by the activity of the human heart and the respiratory activity. Further, when an object is placed on the seat as shown in FIG. 13, a large output is obtained immediately after placing the object,
Since the object does not have the heart activity or respiratory activity as described above, there is no output like the S part in FIG. The difference between the person and the object is used to distinguish the person and the object.

[0005]

However, in the vibration detecting device of the above technique, when the vibration of the object is weak, the acceleration applied to the vibration detecting device is also very small.
The output of the vibration detecting means needs to be amplified by the signal amplifying means, but depending on the vibration, the amplification factor of the signal amplifying means needs to be set to a very large value such as several thousand times, which is the limit when detecting weak vibration. was there.

Further, in the human body detecting device of the above technique, when the presence or absence of a person is determined by detecting an output signal of a relatively low level in a state where the person on the equipment is in a resting state, Since the vibration of the human body is very weak, the output signal of the piezoelectric element becomes a very weak signal of the order of several mv. Therefore, it is necessary to set the amplification factor of the signal amplification means to a very large value, and the circuit is complicated. In addition, there is a problem that it is easily affected by noise.

A first object of the present invention is to provide a vibration detecting device which can easily detect even small vibrations.

A second object of the present invention is to provide a human body detecting apparatus capable of detecting the body movement of a person in a resting state with a small amplification factor.

A third object of the present invention is to provide a human body detecting apparatus capable of detecting the body movement of a person in a resting state with a small amplification factor and not making the human body feel pressure.

[0010]

In order to achieve the above object, a vibration detecting apparatus of the present invention is a vibration input unit which receives a physical vibration, and a vibration detecting unit which generates an output signal according to the applied vibration. Means and at least one vibration amplifying means for physically amplifying the vibration input to the vibration input unit and applying the amplified vibration to the vibration detecting means.

Further, a convex portion is provided on the surface of the vibration amplifying means on the side of the vibration detecting means. Further, a contact surface with the human body, a vibration detecting means for generating an output signal according to the applied vibration, and a vibration applied to the contact surface with the human body are physically amplified and applied to the vibration detecting means. A vibration amplifying means and a judging means for judging the presence or absence of a person in the device based on the output signal of the vibration detecting means are provided.

Further, the vibration detecting means is arranged between the vibration amplifying means and the contact surface with the human body, and the vibration amplifying means is provided with at least one convex portion on the surface on the vibration detecting means side. .

Further, the vibration amplifying means is arranged between the contact surface with the human body and the vibration detecting means, and at least one convex portion is provided on the surface on the side of the vibration detecting means.

Further, the vibration amplifying means is arranged between the contact surface with the human body and the vibration detecting means, and on the side opposite to the contact surface with the human body of the vibration detecting means, and at least one vibration amplifying means is provided on the surface on the vibration detecting means side. Protrusions are provided.

[0015]

The present invention operates as follows with the above construction. When the vibrating object comes into contact with the vibration input unit of the vibration detecting device and the vibration of the object is input, the input vibration is physically amplified by the vibration amplifying means and is added to the vibration detecting means. Then, an output signal corresponding to the amplified vibration is generated, and the vibration is detected.

Further, when the vibrating object comes into contact with the vibration input portion of the vibration detecting device and the vibration of the object is inputted, the inputted vibration is at least one of the vibration amplifying means provided on the surface of the vibration detecting means side. The vibration is amplified by the convex portion and applied to the vibration detecting means, and the vibration detecting means generates an output signal according to the amplified vibration and detects the vibration.

When a human body comes into contact with a contact surface with the human body such as a seat or a bed and pressure is applied by the human body, vibration is input to the contact surface with the human body. This vibration is physically amplified by the vibration amplifying means and applied to the vibration detecting means, and the vibration detecting means generates an output signal according to the amplified signal. Based on the output signal thus generated, the presence or absence of a person in the instrument is determined by the determination means.

When a human body comes into contact with a contact surface with the human body such as a seat or a bed and pressure is applied by the human body, vibration is input to the contact surface with the human body. At this time, the vibration detecting means is pressed against the vibration amplifying means by the pressure of the human body, and the vibration input to the contact surface with the human body is applied to the vibration detecting means in this state. At this time, the vibration applied to the vibration detecting means is amplified by at least one convex portion provided on the surface of the vibration amplifying means on the vibration detecting means side, and the vibration detecting means outputs an output signal corresponding to the amplified vibration. To occur.
Based on the output signal thus generated, the presence or absence of a person in the instrument is determined by the determination means.

Further, when a human body comes into contact with a contact surface with the human body such as a seat or a bed and pressure is applied by the human body, vibration is input to the contact surface with the human body. At this time, the vibration amplifying means is pressed against the vibration detecting means by the pressure of the human body, and the vibration input to the contact surface with the human body is applied to the vibration amplifying means in this state. At this time, the vibration applied to the vibration amplifying means is amplified by at least one convex portion provided on the surface of the vibration amplifying means on the side of the vibration detecting means and added to the vibration detecting means. Generate an output signal according to the vibration. Based on the output signal thus generated, the presence or absence of a person in the instrument is determined by the determination means.

Further, when the human body comes into contact with the contact surface of the instrument with the human body and pressure is applied by the human body, vibration is input to the contact surface with the human body. At this time, the first vibration amplification means presses the vibration detection means by the pressure of the human body, and the vibration detection means is pressed against the second vibration detection means, so that the vibration input to the contact surface with the human body is In this state, it is added to the first vibration amplification means. The vibration applied to the first vibration amplifying means is amplified by at least one convex portion provided on the surface of the first vibration amplifying means on the vibration detecting means side, added to the vibration detecting means, and then applied to the vibration detecting means. The applied vibration is further amplified by at least one convex portion provided on the surface of the vibration amplification means on the vibration detection means side, and is applied to the vibration detection means, and the vibration detection means outputs an output according to the amplified vibration. Generate a signal. Based on the output signal thus generated, the presence or absence of a person in the instrument is determined by the determination means.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a structural diagram of the vibration detection device of this embodiment. FIG. 1A shows a state where the vibration amplifying means does not press the vibration detecting means most due to the vibration of the object, and FIG. 1B shows a state where the vibration amplifying means presses the vibration detecting means most due to the vibration of the object. In FIG. 1, 1 is a vibration detecting means, 2
Is a vibration amplifying means, and 3 is a vibration input section. Here, the vibration detecting means is a flexible piezoelectric element formed by forming a polymer piezoelectric material such as polyvinylidene fluoride (PVDF) into a thin film into a tape shape by attaching a flexible electrode film on both sides. , Generates an output voltage proportional to the time derivative of the deformation amount. Further, the vibration amplification means 2 is made of a plate-shaped synthetic resin, and a plurality of convex portions 13 are formed on the surface on the vibration detection means 1 side. Further, the surface of the vibration input section 3 on the side of the vibration amplification means is made of a material such as urethane which is deformed by pressure.

The operation of the configuration of the above embodiment will be described below. When the vibrating object 7 contacts the vibration input unit 3 and the vibration is transmitted, the vibration is transmitted to the vibration amplifying unit 2 via the vibration detecting unit 1. When the vibration amplifying means 2 vibrates in this way, the vibration is transmitted to the vibration detecting means 1 via the convex portion 13 formed on the surface of the vibration amplifying means 2 on the vibration detecting means 1 side. Here, when the weight of the vibration amplification means 2 is sufficiently smaller than the weight of the object 7, the vibration amplification means 2 vibrates due to the vibration of the object, but the surface of the vibration input unit 3 on the vibration amplification means side is affected by the pressure of urethane or the like. Since it is made of a material that is easily deformed, the vibration amplifying means 2 becomes a vibration having a phase different from that of the object, and the vibration detecting means 1 installed between the vibrating object 7 and the vibration amplifying means 2 is Vibration amplification means 2
Are alternately pressured by both. Here, in the case where at least one convex portion 13 is provided on the surface of the vibration amplifying means 2 on the vibration detecting means 1 side, the vibration detecting means 1 is shown in FIG.
In the state where the vibration amplifying means 2 shown in FIG. 2 does not press the vibration detecting means 1 most, it is not deformed regardless of the convex portion.
In the state where the vibration amplifying means 2 shown in (b) presses the vibration detecting means 1 most, the vibration detecting means in the convex portion 13 of the vibration amplifying means 2 intensively receives the pressure of the vibration of the vibration amplifying means 2. The piezoelectric element of the vibration detecting means 1 is greatly deformed because the piezoelectric element of the vibration detecting means 1 is largely deformed by being pushed into the vibration inputting part, but the vibration detecting means 1 is completely in contact with the vibration amplifying means 2 in the portion without the convex portion. It doesn't change much because it doesn't exist. Therefore, the vibration of the vibration detecting means 1 is the vibration having the maximum swing width in the convex portion 13. At this time, since the vibration detecting means is intensively deformed by the convex portion, the swing width becomes larger than that in the case without the convex portion, and a large voltage can be taken out from the vibration detecting means 1. Further, when a plurality of convex portions 13 on the surface of the vibration detecting means side 1 of the vibration amplifying means 2 are provided, the vibration of the vibration detecting means 1 is divided into a plurality of small vibrations having the maximum swing width in the convex portion 13 and the convex portion 13 The larger the number, the larger the total deformation amount of the vibration detecting means 1, and the further the voltage generated from the vibration detecting means 1 can be increased. Therefore, it is possible to control the magnitude of the output signal of the vibration detecting means 1 by the convex portion 13, and it is possible to generate a larger voltage than that in the case without the convex portion.

By the above-mentioned operation, the vibration of the object is amplified and the output signal corresponding to the amplified vibration is generated in addition to the vibration detecting means. Therefore, it is possible to provide the vibration detecting device which can easily detect even a small vibration. .

In the above embodiment, the vibration amplifying means is provided on the opposite side of the vibration detecting means from the vibrating object, but it may be installed between the vibrating object and the vibration detecting means. At this time, it is more preferable to provide a sheet made of a material that is easily deformed by pressure such as urethane on the opposite side of the vibration detecting means from the object. Further, a plurality of vibration amplification means may be provided on both sides of the vibration detection means.

Next, a second embodiment of the present invention will be described with reference to the accompanying drawings. This embodiment shows a human body detection device. FIG. 2 is a block diagram of this embodiment. Here, the case where it is installed in the seat as an instrument is shown. In FIG. 2, 1 is a vibration detecting means, 2 is a vibration amplifying means, and 6 is a judging means. still,
Here, the output signal of the vibration amplification means 2 is the filter 7
Is filtered to a signal having a specific frequency, amplified by the signal amplifying means 8, smoothed by the smoothing means 9, and sent to the judging means 10. The vibration detecting means 1 is a flexible piezoelectric element formed by forming a polymer piezoelectric material such as polyvinylidene fluoride (PVDF) into a thin film into a tape shape by attaching a flexible electrode film on both surfaces. It is arranged under the seat cloth of the seat 11. FIG. 3 shows a sectional view of the inside of the seat. The vibration amplifying means 2 is made of synthetic resin, and a convex portion 13 is formed on the portion facing the vibration detecting means 1 as shown in the figure.

The operation of the configuration of the above embodiment will be described below. When the human body is seated on the seat 11, the vibration detecting means 1 installed under the seat cloth of the seat 11 is pressed against the vibration amplifying means 2 by the pressure of the human body to be deformed, and a voltage is generated by the piezoelectric effect. When the seated person is kept in a resting state, the vibration detecting means 1 vibrates due to minute body motion of the body propagated by the activity of the heart or respiratory activity of the human body, and a minute signal is generated. FIG. 4 shows an enlarged view of the seat cross section at rest. Due to the piezoelectric effect, the voltage generated from the vibration detecting means 1 increases as the amount of deformation increases. Here, when a person sits down, the vibration detecting means 1 has the convex portion 13 of the vibration amplifying means 2.
Since it is pressed against, it can be deformed according to the state of the convex portion 13 and generate a large signal as compared with the case where there is no convex portion at all. On the other hand, at rest, as shown in FIG. 4, the vibration detecting means 1 does not move because the convex portion 13 of the vibration amplifying means 2 receives the pressure from the human body in a concentrated manner, but the vibration detecting means 1 does not move in the non-convex portion. Since the vibration amplifying means 2 is not completely in contact with the vibration amplifying means 2, it vibrates due to a minute movement of the human body. Since the pressure is intensively applied to the convex portion 13, the vibration has a larger swing width than that in the case without the convex portion, and a large output is generated. Further, when there are a plurality of convex portions 13, the vibration of the vibration detecting means 1 is divided into a plurality of small vibrations having the maximum swing width in the non-convex portion,
The larger the number of convex portions 13, the larger the total deformation amount of the vibration detecting means 1, and the larger the voltage generated from the vibration detecting means 1.
Therefore, it is possible to control the magnitude of the output voltage of the vibration detecting means 1 by the convex portion 13, and it is possible to generate a larger voltage than in the case without the convex portion 13. In this way, the voltage signal generated from the vibration detecting means 1 is filtered by the filter 7 for a specific frequency component, amplified by the signal amplifying means 8 and smoothed by the smoothing means 9, and then sent to the judging means 10. The presence or absence of a person is determined by
The voltage signal generated from the vibration detecting means 1 is applied to the vibration amplifying means 2
Since it can be increased as compared with the case where the convex portion 13 is not provided, it is possible to reduce the amplification factor of the signal amplification means 8 or to omit the signal amplification means 8.

With the above operation, a weak signal obtained from a weak body motion of the human body in a rest state can be increased, so that the presence or absence of the human body on the device can be discriminated with a small amplification factor. With the circuit, it is possible to provide a human body detection device that is less affected by noise.

Next, a third embodiment of the present invention will be described with reference to the accompanying drawings. This embodiment shows an embodiment of a human body detecting device. FIG. 5 is a block diagram of the present embodiment, and FIG. 6 is a sectional view of a seat in which the human body detection device of the present embodiment is installed. 5 and 6 is different from the second embodiment in that the vibration amplifying means 2 is installed on the human body side of the vibration detecting means 1.

The operation of the above configuration will be described below. In the human body detecting means of the second embodiment, the convex portion 1 of the vibration amplifying means 2 is used.
Since 3 is installed on the human body side, the pressure on the human body is
It has been found that when the convex portion 13 of the vibration amplifying means 2 is made large in order to increase the voltage signal generated from the vibration detecting means 1 when concentrated on 3, the pressure is transmitted to the human body when sitting and the seating feeling deteriorates. In order to solve this problem, the vibration amplification means 2 is on the human body side of the vibration detection means 1.

The operation of the configuration of the above embodiment will be described below. When the human body is seated on the seat 11, the vibration amplifying means 2 installed under the surface cloth of the seat 11 presses the vibration detecting means 1 by the pressure of the human body, and the vibration detecting means 1 is deformed to generate a voltage by a piezoelectric effect. To do. When the seated person keeps a resting state, the vibration detecting means vibrates due to minute body movement of the body propagated by the activity of the heart and the respiratory activity of the human body, and a minute signal is generated. FIG. 7 shows an enlarged view of the seat cross section at rest. At rest, the vibration amplifying means 2 vibrates due to minute movements of the human body, and this vibration is caused by the convex portion 13 of the vibration amplifying means 2.
Is transmitted to the vibration detecting means 1, and the vibration detecting means 1 is deformed and vibrates. However, since the vibration detecting means 1 and the vibration amplifying means 2 are not in contact with each other in the non-convex portion, they are not transmitted to the vibration detecting means 1 and the vibration is detected. Means 1 undergoes little deformation. At this time, the vibration of the protrusion 13 is caused by the pressure of the human body
Since the vibration is applied to 3 in a concentrated manner, the vibration has a larger swing width than when there is no convex portion, and a large output is generated from the vibration detecting means 1. Further, when there are a plurality of convex portions 13, the vibration of the vibration detecting means 1 is as shown in FIG.
Since it is divided into a plurality of small vibrations having the maximum swing width, the more the convex portions 13 are, the larger the deformation amount of the vibration detecting means 1 becomes, and the larger the voltage generated from the vibration detecting means 1 becomes. Therefore, it is possible to control the magnitude of the output voltage of the vibration detecting means 1 by the convex portion 13, and it is possible to generate a larger voltage than in the case without the convex portion 13. In this way, the voltage signal generated from the vibration detecting means 1 is filtered by the filter 7 for a specific frequency component, amplified by the signal amplifying means 8 and smoothed by the smoothing means 9, and then sent to the judging means 10. Although the presence or absence of a person is judged by the presence of the person, the voltage signal generated from the vibration detecting means 1 becomes larger than that in the case where the convex portion 13 of the vibration amplifying means 2 is not present, so that the amplification factor of the signal amplifying means 8 is reduced. Therefore, the signal amplification means 8 can be omitted. Further, since the convex portion 9 of the vibration amplifying means 2 is not on the human body side of the vibration amplifying means, the pressure is not concentrated on a certain point and the seating feeling is not deteriorated.

However, the output of the vibration detecting means of this embodiment is
Compared to the second embodiment, since the vibration amplifying means 2 is provided between the human body and the vibration detecting means 1, the vibration of the human body is not directly applied to the vibration detecting means 1 but is absorbed by the vibration amplifying means 2. It becomes smaller under the conditions.

By virtue of the above-mentioned operation, the vibration amplifying means is installed on the human body side of the vibration detecting means, so that the vibration detecting means is deformed by a minute movement of the body at rest without concentrating the pressure of the human body on a specific portion. Since the amount can be increased and the voltage generated from the vibration detection means can be increased, it is possible to determine the presence or absence of the human body with a small amplification factor without deteriorating the feeling of sitting. Therefore, with a simple circuit There is an effect that it is possible to provide a human body detection device that is less affected by noise.

Next, a fourth embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, an embodiment of the human body detecting device will be shown. FIG. 8 is a block diagram of the present embodiment, and FIG. 9 is a sectional view of a seat in which the human body detection device of the present embodiment is installed. 8,
In FIG. 9, the present embodiment differs from the second and third embodiments in that the human body side of the vibration detecting means 1 is the first vibration amplifying means 17, and the opposite side of the human body is the second vibration amplifying means 18. It has the two vibration amplification means.

The operation of the above configuration will be described below. In the second and third embodiments, when the number of convex portions is increased in order to increase the signal obtained from the vibration detecting means, the distance between the convex portions and the convex portions becomes narrower, so that the vibration of the vibration detecting means 1 is changed. It has been found that the output of the vibration detecting means 1 cannot be further increased if the width is reduced and the number of convex portions is increased to some extent. Further, when the vibration amplification means is installed on the human body side of the vibration detection means in order to improve the seating feeling as in the third embodiment, the vibration amplification means of the first embodiment is opposite to the human body of the vibration detection means. It was found that the output of the vibration detection means was smaller than that when installed on the side. In order to solve these problems, the human body detection apparatus of this embodiment has a first vibration amplification means 17 on the human body side of the vibration detection means 1 and a second vibration amplification means 18 on the opposite side of the human body.

The operation of the configuration of the above embodiment will be described below. When the human body is seated on the seat 11, the vibration detecting means 1 is pressed by the first vibration amplifying means 17 installed under the seat cloth of the seat 11, and the vibration detecting means 1 is further amplified by the second vibration on the side opposite to the human body. It is pressed against the means 18 and is deformed, and a voltage is generated by the piezoelectric effect. When the seated person remains in a resting state, the vibration detecting means 1 operates as the first vibration amplifying means 17 and the second vibration amplifying means 1 as shown in FIG.
8 is held in a compressed form by both, but the vibration due to minute body motion of the body propagated by the activity of the heart and the respiratory activity of the human body is the vibration detecting means via the first vibration amplifying means on the human body side. Since it is added to 1, the vibration detecting means 1 vibrates and a minute signal is generated. FIG. 10 shows an enlarged view of the seat cross section at rest. Here, the convex portion 20 of the second vibration amplifying means 18 is provided between the convex portions of the first vibration amplifying means 17, and the convex portion 20 of the second vibration amplifying means 18 is provided between the convex portions. The convex portion 19 of the first vibration amplification means 17 is arranged so as to come to
Since the convex portions 19 and 20 of the two vibration amplifying means press the vibration detecting means 1 in opposite directions, the deformation amount of the vibration detecting means 1 is smaller than that in the case where the convex portions are provided on only one surface of the vibration detecting means 1. As a result, a larger voltage can be generated. Even if the distance between the convex portions is narrowed, if the convex portions of the two vibration amplifying means press different portions of the vibration detecting means 1 and the swing width of the vibration can be sufficiently taken, the deformation amount of the vibration detecting means. Can be increased, and a larger voltage can be generated. In this way, the voltage signal generated from the vibration detecting means 1 is filtered by the filter 7 for a specific frequency component, amplified by the signal amplifying means 8 and smoothed by the smoothing means 9, and then sent to the judging means 10. Although the presence or absence of a person is determined by the presence of the person, the voltage signal generated from the vibration detecting means 1 becomes larger than that in the case where there is no vibration amplifying means or in either case. It is possible to reduce the size or omit the signal amplifying means 8.
Further, since the convex portion 19 of the first vibration amplifying means 17 is not on the human body side, it does not concentrate on a point where the human body pressure is present, and the convex portion 20 of the second vibration amplifying means 18 is also located between the human body and the convex portion 20. Since the vibration amplifying means 17 of No. 1 does not directly apply pressure to the human body, the seating feeling is not deteriorated.

Due to the above-mentioned action, the vibration detection means is provided with two
By installing two vibration amplification means, it is possible to increase the amount of deformation of the vibration detection means due to minute body movements of the body at rest without concentrating the pressure of the human body on a specific part, and to reduce the voltage generated by the vibration detection means. Since the size of the human body can be increased, it is possible to determine the presence or absence of the human body with a small amplification factor without deteriorating the feeling of sitting. Therefore, it is possible to provide a human body detection device having a simple circuit and less influence of noise. There is an effect that you can.

In the above four embodiments, the vibration amplifying means 2, the first vibration amplifying means 17, and the second vibration amplifying means 18 are molded of synthetic resin, but they are formed by pressure of urethane or the like. It may be a molded article that is easily deformed. However, in this case, since the convex portion intensively receiving the weight of the human body is soft, the deformation of the vibration detecting means may be small and the effect may be reduced. Alternatively, a flat article made of a relatively soft material such as urethane and a convex article made of a relatively hard material such as a synthetic resin may be attached.

In the above four embodiments, the vibration detecting means 1 includes the vibration amplifying means 2, the first vibration amplifying means 17, and the convex portions 19 and 2 of the second vibration amplifying means 18, respectively.
A pressure absorbing means such as a sponge may be added between the vibration amplifying means and the vibration detecting means in order to prevent a sudden impact from being applied.

With the vibration detecting device of the above embodiment, the vibration can be easily detected even when the object vibrates weakly.

Further, with the human body detecting apparatus of the above-described embodiment, it is possible to accurately grasp the number of seated persons and vacant seats in a theater or a car, and to manage the presence of a person in a bed in a hospital or the like with a small amplification factor with high accuracy. Further, when applied to the air conditioning control and the sound field control in the room or in the vehicle, the air conditioning control and the sound field control according to the seating location can be performed, and the comfort in the room is enhanced.

[0041]

As described above, according to the vibration detecting device of the present invention, the following effects can be obtained.

That is, since the vibration of the object applied from the vibration input section is amplified by the vibration amplifying means and applied to the vibration detecting means, and the amplified vibration is detected, the vibration of the object is easily vibrated. Can be detected.

Further, since the vibration amplification means is provided with at least one convex portion on the surface on the vibration detection means side, it is possible to amplify the vibration input to the vibration input portion and add it to the vibration detection portion.

Further, the vibration due to minute body movements of the body at rest is amplified by the vibration amplification means and added to the vibration detection means,
By detecting the amplified vibration, it is possible to increase the signal generated from the vibration detection means, it is possible to determine the presence or absence of the human body with a small amplification factor,
Therefore, it is possible to provide a human body detection device that is less affected by noise with a simple circuit.

Further, the vibration detecting means is installed between the vibration amplifying means and the human body, and the vibration amplifying means has at least one convex portion on the surface on the vibration detecting means side, so that the minute body of the body at rest is Since the vibration due to the motion can be amplified and applied to the vibration detecting means, the voltage generated from the vibration detecting means can be increased.

Furthermore, the pressure of the human body is concentrated on a specific portion by the vibration amplifying means which is installed between the vibration detecting means and the contact surface with the human body and has at least one convex portion on the surface on the side of the vibration detecting means. Since the vibration due to the minute body movement of the body at rest can be amplified and applied to the vibration detecting means without increasing the pressure on the human body, the voltage generated from the vibration detecting means can be increased.

Further, the vibration amplifying means installed on both sides of the vibration detecting means and having at least one convex portion on the surface on the side of each vibration detecting means allows the human body at rest without concentrating the pressure of the human body on a specific portion. Since the vibration due to the minute body movement can be amplified and applied to the vibration detecting means, the voltage generated from the vibration detecting means can be increased without making the human body feel the pressure.

[Brief description of drawings]

FIG. 1 (a) is a cross-sectional view showing a state in which a vibration detecting means of a vibration detecting apparatus according to a first embodiment of the present invention is not pressed most. FIG. 1 (b) shows a state in which the vibration detecting means of the apparatus is pressed most. Cross section

FIG. 2 is a block diagram of a human body detection device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a seat of the same device.

FIG. 4 is an enlarged sectional view of a seat of the device.

FIG. 5 is a block diagram of a human body detection device according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a seat of the device.

FIG. 7 is an enlarged sectional view of a seat of the device.

FIG. 8 is a block diagram of a human body detection device according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a seat of the device.

FIG. 10 is an enlarged view of a cross section of a seat of the device.

FIG. 11 is a block diagram of a human body detection device in a conventional example.

FIG. 12 is a waveform diagram of an output signal of a smoothing unit of the same device.

[Explanation of symbols]

 1 Vibration Detection Means 2 Vibration Amplification Means 3 Vibration Input Section 6 Vibrating Objects 7 Filters 8 Signal Amplification Means 9 Smoothing Means 10 Judgment Means 11 Seats 13 Convex Parts of Vibration Amplification Means 17 First Vibration Amplification Means 18 Second Vibrations Amplifying means 19 Convex portion of first vibration amplifying means 20 Convex portion of second vibration amplifying means

Claims (6)

[Claims] 1. A vibration input section for receiving a physical vibration, a vibration detecting means for generating an output signal in accordance with the applied vibration, and a vibration input to the vibration input section for physically amplifying the vibration. A vibration detection device comprising vibration amplification means in addition to the vibration detection means. 2. The vibration detection device according to claim 1, wherein the vibration amplification means is provided with at least one convex portion on the surface on the vibration detection means side. 3. A contact surface for contact with a human body, a vibration detecting means for generating an output signal in response to the applied vibration, and a vibration detected by physically amplifying the vibration applied to the contact surface with the human body. A human body detecting device comprising a vibration amplifying means to be added to the means and a judging means for judging the presence or absence of a person based on an output signal of the vibration detecting means. 4. The vibration detecting means is arranged between the contact surface with the human body and the vibration amplifying means, and the vibration amplifying means has at least one convex portion on the surface on the vibration detecting means side. The human body detection device described. 5. The human body detection device according to claim 3, wherein the vibration amplification means is provided between the contact surface with the human body and the vibration detection means, and has at least one convex portion on the surface on the side of the vibration detection means. . 6. The vibration amplifying means is provided between the contact surface with the human body and the vibration detecting means and on the opposite side of the contact surface of the vibration detecting means with the human body, and on the surface of each of the vibration detecting means. The human body detection device according to claim 3, wherein the has at least one convex portion.